Climate at a Glance | Divisional Rankings | National Centers for Environmental Information (NCEI)

Divisional Rankings

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Please note, Degree Days and Palmer Indices are not available for Alaska or Hawaii. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Iowa, Climate Division 4

December 2016 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 2016 1-Month	1.00	0.05	0.95	104th Driest	Driest since: 2013	1976
December 2016 1-Month	1.00	0.05	0.95	27th Wettest	Wettest since: 2015	2015
Nov–Dec 2016 2-Month	0.35	0.10	0.25	79th Driest	Driest since: 2013	1976
	0.35	0.10	0.25	52nd Wettest	Wettest since: 2015	2015
	Ties: 1951
Oct–Dec 2016 3-Month	0.20	0.11	0.09	73rd Driest	Driest since: 2013	1955
Oct–Dec 2016 3-Month	0.20	0.11	0.09	58th Wettest	Wettest since: 2015	2015
Sep–Dec 2016 4-Month	0.76	0.14	0.62	89th Driest	Driest since: 2013	1939
Sep–Dec 2016 4-Month	0.76	0.14	0.62	42nd Wettest	Wettest since: 2015	2015
Aug–Dec 2016 5-Month	0.88	0.12	0.76	92nd Driest	Driest since: 2013	1976
Aug–Dec 2016 5-Month	0.88	0.12	0.76	39th Wettest	Wettest since: 2015	2015
Jul–Dec 2016 6-Month	0.93	0.13	0.80	96th Driest	Driest since: 2013	1976
Jul–Dec 2016 6-Month	0.93	0.13	0.80	35th Wettest	Wettest since: 2015	2015
Jun–Dec 2016 7-Month	0.32	0.13	0.19	74th Driest	Driest since: 2013	1976
Jun–Dec 2016 7-Month	0.32	0.13	0.19	57th Wettest	Wettest since: 2015	2015
May–Dec 2016 8-Month	0.49	0.13	0.36	81st Driest	Driest since: 2013	1936
May–Dec 2016 8-Month	0.49	0.13	0.36	50th Wettest	Wettest since: 2015	2015
Apr–Dec 2016 9-Month	0.70	0.13	0.57	94th Driest	Driest since: 2013	1934
Apr–Dec 2016 9-Month	0.70	0.13	0.57	37th Wettest	Wettest since: 2015	2015
Mar–Dec 2016 10-Month	0.56	0.10	0.46	87th Driest	Driest since: 2013	1934
Mar–Dec 2016 10-Month	0.56	0.10	0.46	44th Wettest	Wettest since: 2015	2015
Feb–Dec 2016 11-Month	0.57	0.11	0.46	90th Driest	Driest since: 2013	1934
Feb–Dec 2016 11-Month	0.57	0.11	0.46	41st Wettest	Wettest since: 2015	2015
Jan–Dec 2016 12-Month	0.56	0.11	0.45	92nd Driest	Driest since: 2013	1934
	0.56	0.11	0.45	39th Wettest	Wettest since: 2015	2015
	Ties: 1923, 1969
Jul 2015–Dec 2016 18-Month	1.59	0.13	1.46	124th Driest	Driest since: 2014	1956
Jul 2015–Dec 2016 18-Month	1.59	0.13	1.46	6th Wettest	Wettest since: 2015	2015
Jan 2015–Dec 2016 24-Month	1.34	0.12	1.22	121st Driest	Driest since: 2014	1934
Jan 2015–Dec 2016 24-Month	1.34	0.12	1.22	9th Wettest	Wettest since: 2015	2015
Jan 2014–Dec 2016 36-Month	1.30	0.12	1.18	126th Driest	Driest since: 2015	1936
Jan 2014–Dec 2016 36-Month	1.30	0.12	1.18	3rd Wettest	Wettest since: 2010	2009
Jan 2013–Dec 2016 48-Month	0.85	0.12	0.73	113th Driest	Driest since: 2015	1936
Jan 2013–Dec 2016 48-Month	0.85	0.12	0.73	15th Wettest	Wettest since: 2011	2010
Jan 2012–Dec 2016 60-Month	0.40	0.11	0.29	87th Driest	Driest since: 2015	1937
	0.40	0.11	0.29	40th Wettest	Wettest since: 2012	2018
	Ties: 1948

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 31, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings

Climate at a Glance Divisional Rankings

Divisional Rankings

Iowa, Climate Division 4

December 2016 Palmer Z-Index Rankings

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